Move ExtraData from WebRequest to WebDataSource....

webkit/api/public/WebDataSource.h

Index: webkit/api/public/WebDataSource.h
===================================================================
--- webkit/api/public/WebDataSource.h	(revision 16382)
+++ webkit/api/public/WebDataSource.h	(working copy)
@@ -1,10 +1,10 @@
 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ -14,7 +14,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -58,7 +58,7 @@
         // to a location specified by a redirect that was followed.
         virtual const WebURLRequest& request() const = 0;
 
-        // Returns the response associated to this datasource.
+        // Returns the response associated with this datasource.
         virtual const WebURLResponse& response() const = 0;
 
         // When this datasource was created as a result of WebFrame::loadData,